The simplest delineation between POD and comments is that POD must (still) make sense without sight of any associated code. Ie. Once it has been extracted and formatted.

Comments on the other hand are semantic extensions of the code with which they are associated and should (must) only be read in that closed context. In most cases they will make little or no sense outside of that context. Comments should enhance the code, not replicate it.

The biggest and most frequent mistake people make is to try and make their comments read as English (or some other language) and so duplicate the code. They do themselves and their readers a disservice by doing so. When the two do not tally, which should the reader take to be the author's true intent?

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.

"Science is about questioning the status quo. Questioning authority".

In the absence of evidence, opinion is indistinguishable from prejudice.